diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index b028458..182b849 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        ruby-version: ['3.2']
+        ruby-version: ['3.3']
 
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index d03569d..9bc07d3 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -18,49 +18,53 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: ['2.7', '3.0', '3.1', '3.2']
-        gemfile: [ csv_22.0, mongoid_8.0 ]
-        experimental: [false]
+        ruby-version: ['2.7', '3.0', '3.1', '3.2', '3.3']
+        gemfile: [ csv_22.0, mongoid_8.0, mongoid_9.0 ]
+        channel: ['stable']
 
         include:
-          - ruby-version: 'head'
-            gemfile: mongoid_edge
-            experimental: true
           - ruby-version: '2.7'
             gemfile: csv_edge
-            experimental: true
+            channel: 'experimental'
           - ruby-version: '3.0'
             gemfile: csv_edge
-            experimental: true
+            channel: 'experimental'
           - ruby-version: '3.1'
             gemfile: csv_edge
-            experimental: true
+            channel: 'experimental'
           - ruby-version: '3.2'
             gemfile: csv_edge
-            experimental: true
+            channel: 'experimental'
+          - ruby-version: '3.3'
+            gemfile: csv_edge
+            channel: 'experimental'
           - ruby-version: 'head'
             gemfile: csv_edge
-            experimental: true
+            channel: 'experimental'
+
           - ruby-version: '2.7'
             gemfile: mongoid_edge
-            experimental: true
+            channel: 'experimental'
           - ruby-version: '3.0'
             gemfile: mongoid_edge
-            experimental: true
+            channel: 'experimental'
           - ruby-version: '3.1'
             gemfile: mongoid_edge
-            experimental: true
+            channel: 'experimental'
           - ruby-version: '3.2'
             gemfile: mongoid_edge
-            experimental: true
+            channel: 'experimental'
+          - ruby-version: '3.3'
+            gemfile: mongoid_edge
+            channel: 'experimental'
           - ruby-version: 'head'
             gemfile: mongoid_edge
-            experimental: true
+            channel: 'experimental'
 
     env:
       BUNDLE_GEMFILE: gemfiles/${{ matrix.gemfile }}.gemfile
 
-    continue-on-error: ${{ matrix.experimental }}
+    continue-on-error: ${{ matrix.channel != 'stable' }}
 
     steps:
     - uses: actions/checkout@v4
diff --git a/Appraisals b/Appraisals
index dee21bb..f979fb5 100644
--- a/Appraisals
+++ b/Appraisals
@@ -12,6 +12,10 @@ appraise 'mongoid-8.0' do
   gem 'mongoid', '~> 8.0'
 end
 
+appraise 'mongoid-9.0' do
+  gem 'mongoid', '~> 9.0'
+end
+
 appraise 'mongoid-edge' do
   gem 'mongoid', git: 'https://github.com/mongodb/mongoid.git', branch: 'master'
 end
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cbf8c08..6aef39c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 14.1.0 / 2024-05-01
+
+* [FEATURE] Add Mongoid 9.0 compatibility
+* [ENHANCEMENT] Update development dependencies
+
 ## 14.0.0 / 2023-09-06
 
 * [FEATURE] Drop Ruby 2.6 support
diff --git a/client_side_validations-mongoid.gemspec b/client_side_validations-mongoid.gemspec
index c357d95..f0c2a7e 100644
--- a/client_side_validations-mongoid.gemspec
+++ b/client_side_validations-mongoid.gemspec
@@ -28,5 +28,5 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = '>= 2.7'
 
   spec.add_dependency 'client_side_validations', '~> 22.0'
-  spec.add_dependency 'mongoid', '>= 8.0', '< 9'
+  spec.add_dependency 'mongoid', '>= 8.0', '< 10'
 end
diff --git a/gemfiles/mongoid_9.0.gemfile b/gemfiles/mongoid_9.0.gemfile
new file mode 100644
index 0000000..dff7a35
--- /dev/null
+++ b/gemfiles/mongoid_9.0.gemfile
@@ -0,0 +1,23 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal"
+gem "byebug"
+gem "database_cleaner-mongoid"
+gem "m"
+gem "minitest"
+gem "mocha"
+gem "rake"
+gem "rubocop"
+gem "rubocop-minitest"
+gem "rubocop-packaging"
+gem "rubocop-performance"
+gem "rubocop-rails"
+gem "rubocop-rake"
+gem "simplecov"
+gem "simplecov-lcov"
+gem "sinatra"
+gem "mongoid", "~> 9.0"
+
+gemspec path: "../"
diff --git a/lib/client_side_validations/mongoid/version.rb b/lib/client_side_validations/mongoid/version.rb
index 0940bb7..4950435 100644
--- a/lib/client_side_validations/mongoid/version.rb
+++ b/lib/client_side_validations/mongoid/version.rb
@@ -2,6 +2,6 @@
 
 module ClientSideValidations
   module Mongoid
-    VERSION = '14.0.0'
+    VERSION = '14.1.0'
   end
 end